package com.example.javaspringweb.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

// 登录处理程序拦截器
// 写了这HandlerInterceptor 就是拦截器
public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 登录成功之后 应该有用户的session
        Object userDemo = request.getSession().getAttribute("userDemo");

        if (userDemo == null){
            request.setAttribute("msg","没有权限！请登录");
            request.getRequestDispatcher("/login.html").forward(request, response);
            return false;
        }else {
            return true;
        }


    }


}
